Core for forming concrete piles.



Patemmuly 25, 1916.

M. lvl. uPsoN @L H. R. DAY.

CORE FOR FORNIING CONCRETE PILES. i

APPLICATION FILED OCT- I, 1913.

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I 'SME-iv- M. M. UPSON & H. a. DAY.

CORE FOR FORMING CONCRETE PILES.

APPLICATION FILED ocT.1.1913.

E. l 92,3247., v Patented July`25, 1916.

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M. IV. UPSON 6L H. R. DAY.

CORE FOR FORIVIING CONCRETE PILES.

APPLICATION Flu-:D 001.1, 1913.

192 247 v patented July-25,1916. 2 Y 3 s HEETs-sHE ET s.

UNITED STATES PATENT OFFICE.

MAXWELL MAYEELL UrsON, OE ENGLEWOOD, NEW JERSEY, AND HAEEY E.' .OAY, OF BROOKLYN, NEW YORK, AssIGNOEs To RAYMOND cONcEETEPILE COMPANY, OE NEW YORK,- N. Y., .av-CORPORATION OE NEW JERSEY. I

CORE FOR FOBMING CNCRETE PILES.

Specification ofLetters Patent.

Patented July 25,1916.

vApplimuami mea october 1, 191s. serial No. 792,742.

To all inkom t may concern:

Be it lmown that we, MAXWELL M. UPsoN and HARRY R. DAY, citizens of the Unitedv .has been driven into the ground, is withdrawn from the shell, the empty space being then iilled with a solid mass of concrete, which, on hardening, forms a concrete pile. l The invention, subject of this application for Letters Patent, is embodied in an expansible core adapted to be used for this purpose, and consists in improvements in the construction of the same designed to render it 4more durable, eiicient and easy of manipulation'. p

The improvements reside chiefly 1n the provision in such cores, when composed of two substantially concentric members capable of limited longitudinal movement relatively to each other, of means whereby the expansion of the outer sectional member 1s secured by wedging action and' of horizontally operating means for maintaining the relative displacement necessary for such purpose; in the combination with the sectional and wedging members respectively, of an interposed means for absorbing the shock caused by the relative motion of the outer and inner members under the action of the driving hammer; in a point or end of novel construction, designed to aiord an extended lateral contact surface for the travel of the ends of the contracting and expanding sectional members and to prevent injury to the shell while being driven, and in other details of construction to be more fully hereinafter described.

The said improvements and the novel features of construction peculiar to the device are illustrated in the, ings, in which- 'f' Figure 1 is a View in elevation of the lim'- accompanying drawproved collapsible core in its entirety. Fig..I

2 is a vertical centralsection ofthe upper portion of the same onan enlarged scale.

Fig. 3 is a similar View of the lower portion. Fig. 4 1s a vertical section of the head of the core and parts adjacent thereto, on the line 4-4 of Fig. 8, and with portions broken away. Fig. 5 is a similar but unbroken section showing the two members in dierent relativepositions. Fig. 6, is a view in elevation of the same parts viewed from the right, or in the direction of the arrow in Fig. 7. Fig. 7 is a top plan view of the core. Fig. 8 is a broken section on the line 8-8 of Fig. 4. Fig.` 9` is a horizontal section on line 9 9 of Fig. 4. Fig. 10 is a similar section on the line 10-10 of Fig. 2. Fig. 11 is an enlarged section of the lower end or point of the core, showing the sectional member collapsed. Fig. 12 is an enlarged sectional detail on line 12-12 of Fig. 8 of a part of the means for securing the relative vertical movement between the two core members. Fig. 13 is a cross section on line 13-13 of Fig. 3.

The core comprises in the main, an outer sectional member forming a collapsible easing and made up of three parts or sections A, and/an inner wedging member composed of tubular sections B and solid sections C secured together in'alinement. The sections A of the outer member are formed or pro vided with beveled surfaces D and the iniier member with corresponding inclined projec- Ytions E at suitable intervals, the construction lin this respect being essentially that heretofore used in this art. rI he said sections A are moreover connected at two or more points to the inner or wedging member B by plates or links F which limit the expansive movement of the sections under the wedging action of the inner member and preserve the gradually tapered form of the core as a whole. These connecting plates or links may be placed without diliculty in the upper and larger parts of the core, but as the space in the narrower portion is not equally available for this purpose, the wedging member is formed or provided at one or sol 1 'more peiiefi sich gecifwau 'dpndiag hooks or projections G, and the outer member with upward'projections H ;(Figs. v3 and,

v13), over; which Aa` tying. means, such as a ,steel cable R, is placed,so as' to bind the wedging and the outer members together. l

In devices of this kind it has been found very desirable to maintain 'the two members herein described infixedA relation to 'one anotheraftei' they have been brou ht vto the position in which the outer mem r ofthe core fully expanded. -This has beeniaccomplished by modifications of the form of the wedgingsurfaces and by other eX edients designedto prevent the rebound ol- Vlowing' the impact of the driving'hammer member there is a recess in which lies an annular plate J having a series of upwardly projecting lugs K and a lateral lug L pro- -jecting through anopening in one ofy the sections A. To the inner walls of the saidv sections A and near the upper ends of4 the same, are secured plates M conforming -in shape to the sections and provided with interior flanges N having depending lugs O..

A spiral spring P is connected at one end to a lug Q depending from the head I, and

at the other end to the'lug-L, and tends, normally, to turn the plate J until one ofthe lugs thereon encounters alstop R projecting from the head I. When the plate J is in this position its lugs K lie immediately'under the lugs O and the outer or sectional member is fullyexpanded and its upper end in contact with the head I." The plate J assumes this position automatically whenever the wedging member is forced downward into the isectional member sufficiently to fully expand the latter and contact with its upper edge. Thus in the operative condition of the device the two members are locked and thereby lixedly. maintained in their proper relative positions.

To raise the wedging member for the purpose of collapsing the other, it is necessary to turn theplate J so that its lugs will re i ister with the spaces between the lugs This may be effected by a cord S connected to the lugsL and runninlg over a ulley T, and by means of which t e plate may be shifteduntilthe lu s K encounter stops 'U in which position t e saidlugs are free to enter the spaces betweenl lugs O.

, As is welliknowh'by who use dcevices of this kind, after the core and its surrounda res t of the inertia of the latter, a severe strain is imposed upon any connections that may. exist between the two when they sud? denly take up the full weight of the outer section. shock, rigid projections V, W, are secured to the wedging and sectional members respectively to serve as buffers and absorb the forcing of the impact between the two mem'- bers. These projections ma .be angle irons bolted, riveted o'r otherwise firmly united to the several sections A and tothe wedging member B respectively, and they are so spaced as to collide before the link or other connections between the two members are subjected to an injurious shock or strain.

In order to provide for a smoothexterior surface at the lower end ofthe core, that the paper or other shell may not be punctured or injured by the edges of the sectional casing, the end or point of the core is a casting having a rounded head X and a stem Y, c which latter enters a slot or recess in the end of the. wedging member C and is connected therewith y a bolt Z passing through a slot in the stem Y, as shown in Figs. 3 and 11. The head, X, around the base of the stem' Y, presents toA the ends of the sections A a fiat and somewhat extended surface over which the said ends travel in expanding and collapsing under the action of vthe wedging member. When the outer member is fully expanded, the edges of the endsof the sections are flush with those of the head X, as shown in Fig. 3,' 'but on colthe wedging member down into the sectional member until the rotary locking device 0perates; thereafter it is introduced into the shell or casing and completely fills the same. Thereafter thecore operates as a solid body completely filling the interior of the shell or casing, and the pile is driven in the usual Way. The subsequent operation of collapsing the core, removing it from the shell and filling the latter with concrete, will be understood without further descri tion in'l View of the common practice in thls art.

.In respects not specifically noted herein 75 i To relieve v these parts of such .v

I -the device is or may be constructed in the usual manner and provided with those appliances which have kbeen found in practice, l

useful and necessary. So far as concerns the chief characteristic features of the improvement, the details of construction are not important, as these may be greatly varied without departure from the invention as defined by the broader claims.

What we regard as of our invention, and desire to secure by Letters Patent, is:

1. A core for the purpose set forth, com? prising in combination, a sectional outer member, a wedging member longitudinally movable therein for eecting the expansion and collapse of the same, and a locking means movable rotatively about the axis of the coreinto and out of locking position to respectively prevent and permit longitudinal movement of the said wedging member.

2. A core for the purpose set for'th, comprising in combination, a sectional outer member, a wedging member longitudinally movable therein, a rotary locking device between the two members, and an actuating spring for automatically operating said device when the two members are brought to the relative positio'ns necessary to secure expansion of the outer member.

3. A core for the purpose set forth, comprising in combinatlon, an inner wedging member and an outer sectional member, adapted to be expanded by a given movement of the wedging member into the same, and a locking device consisting of \a series of lugs movable around the wedging member and coperating with a corresponding series of lugson the sectional member.

4. A core for the purpose set forth, comprising in combination, an expansible and collapsible member composed of :radially movable sections, a wedging member movable longitudinally in the other in one dii rection to expand the same, radial links pivoted at their inner ends to the wedging member and at their ends to the sections-of the other member to limit the expanding and overhanging the said outwardly proyjecting devices on the -wedging member to receive the impact of said devices when the wedging member is raised to lift the core as a whole.

5. A core for the purpose set forth, comprising in combination, a wedging member, a collapsible sectional member, and a head connected with lost motion tothe lower end of the wedging member and presenting a fiat upper surface to the end of the sectional member.

6. A core for the purpose set forth, comprising in combination, a rigid wedging member and a collapsible member surrounding the same, a head connected to the lower end of the wedging member and capable of lost motion with respect thereto, the said head presenting a flat bearing surface to the end of the collapsible member, the diameter of the head being that of the end of the colla s'ble member when fully expanded.

if. A core for the purpose set forth, com prising in combination, an inner wedging member, a surrounding sectional collapsible member and a head having a stem connected to but capable of a limited movement within the lower end of the wedging member, the said head presenting a bearing surface to the ends of the sections of the collapsible member.

In testimony whereof we aiix our signatures in the presence of two subscribing witnesses.

MAXWELL MAYBELL UPSON. HARRY R. DAY. Witnesses;

M. LAWSON DYER, THOMAS J .'BYRNE. 

